fallback: legalize: G_STORE <2 x s1>,p0

Run:	main-04ca53e65f-20261014-105623
Kind:	fallback
Category:	legalize: G_STORE <2 x s1>,p0 NEW
Occurrences:	1520 in 994 configs, 356 test files
Snippet from:	calling-conv-vector-float.d842952f52.ll (mutant of calling-conv-vector-float.ll) @callee_v2f32 via llvm-extract + llvm-reduce
Config:	`-mtriple=riscv64 -mattr=+f -target-abi=lp64f -verify-machineinstrs`
Local check:	reproduces at 04ca53e65f
Compiler Explorer:	https://godbolt.org/z/f9jjTT85E (llc-assertions-trunk, checked 2026-10-14 11:03 UTC): G reproduces

Snippet:

define <2 x float> @callee_v2f32() {
  store <2 x i1> zeroinitializer, ptr null, align 1
  ret <2 x float> zeroinitializer
}

Compiler Explorer panes:

Pane	Options	Exit	Insts	stderr
GlobalISel	`-mtriple=riscv64 -mattr=+f -target-abi=lp64f -verify-machineinstrs -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.*`	0	4	remark: <unknown>:0:0: unable to legalize instruction: G_STORE %0:_(<2 x s1>), %2:_(p0) :: (store (<2 x s1>) into `ptr null`) (in function: callee_v2f32) warning: Instruction selection used fallback path for callee_v2f32
SelectionDAG (control)	`-mtriple=riscv64 -mattr=+f -target-abi=lp64f -verify-machineinstrs -global-isel=0`	0	4	-

Reproduce:

llc -mtriple=riscv64 -mattr=+f -target-abi=lp64f -verify-machineinstrs -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc -mtriple=riscv64 -mattr=+f -target-abi=lp64f -verify-machineinstrs -global-isel=0 snippet.ll -o -

Local llc output:

remark: <unknown>:0:0: unable to legalize instruction: G_STORE %0:_(<2 x s1>), %2:_(p0) :: (store (<2 x s1>) into `ptr null`) (in function: callee_v2f32)
warning: Instruction selection used fallback path for callee_v2f32

Occurrences (1520) (first 50):

Input	Function	Config
abds.098d426c17.ll (mutant of abds.ll)	abd_subnsw_i32	`-mtriple=riscv32 -mattr=+zbb`
abds.1992e026f6.ll (mutant of abds.ll)	abd_subnsw_i32	`-mtriple=riscv64 -mattr=+zbb`
abds.7721ba3ac8.ll (mutant of abds.ll)	abd_subnsw_i32	`-mtriple=riscv64`
abds.8b910b7ed9.ll (mutant of abds.ll)	abd_subnsw_i32	`-mtriple=riscv32`
abdu.20ab4f17c9.ll (mutant of abdu.ll)	abd_select_i128	`-mtriple=riscv64`
abdu.3b30ed1946.ll (mutant of abdu.ll)	abd_select_i128	`-mtriple=riscv64 -mattr=+zbb`
abdu.7dcd7c54ec.ll (mutant of abdu.ll)	abd_select_i128	`-mtriple=riscv32 -mattr=+zbb`
abdu.d7c27d0cb1.ll (mutant of abdu.ll)	abd_select_i128	`-mtriple=riscv32`
addc-adde-sube-subc.5708f04ccd.ll (mutant of addc-adde-sube-subc.ll)	addc_adde	`-mtriple=riscv32 -verify-machineinstrs`
addimm-mulimm.a2c055b31a.ll (mutant of addimm-mulimm.ll)	mul3000_add8990_c	`-mtriple=riscv64 -mattr=+m,+zba -verify-machineinstrs`
addimm-mulimm.ee67761dd8.ll (mutant of addimm-mulimm.ll)	mul3000_add8990_c	`-mtriple=riscv32 -mattr=+m,+zba -verify-machineinstrs`
aext.bd54601c5a.ll (mutant of aext.ll)	aext	`-mtriple=riscv64 -verify-machineinstrs`
aext.df8fdf4402.ll (mutant of aext.ll)	aext	`-mtriple=riscv32 -verify-machineinstrs`
align.9a9c34349f.ll (mutant of align.ll)	foo	`-mtriple=riscv32 -mattr=+c -verify-machineinstrs`
align.e59c77def7.ll (mutant of align.ll)	foo	`-mtriple=riscv32 -verify-machineinstrs`
alloca.43d82f465d.ll (mutant of alloca.ll)	alloca_callframe	`-mtriple=riscv32 -verify-machineinstrs`
alu16.2854ec074d.ll (mutant of alu16.ll)	slli	`-mtriple=riscv64 -verify-machineinstrs`
alu16.7f44659ed1.ll (mutant of alu16.ll)	slli	`-mtriple=riscv32 -verify-machineinstrs`
alu8.77246045e6.ll (mutant of alu8.ll)	slli	`-mtriple=riscv64 -verify-machineinstrs`
alu8.ac247b78b4.ll (mutant of alu8.ll)	slli	`-mtriple=riscv32 -verify-machineinstrs`
analyze-branch.a92fdede34.ll (mutant of analyze-branch.ll)	test_bcc_fallthrough_nottaken	`-mtriple=riscv32 -verify-machineinstrs`
arith-with-overflow.f0d4e05d73.ll (mutant of arith-with-overflow.ll)	uadd	`-mtriple=riscv32 -verify-machineinstrs`
atomic-cmpxchg-flag.66be02584f.ll (mutant of atomic-cmpxchg-flag.ll)	cmpxchg_i32_seq_cst_seq_cst	`-mtriple=riscv64 -mattr=+a -verify-machineinstrs`
atomic-cmpxchg-flag.eb4f6ad9f7.ll (mutant of atomic-cmpxchg-flag.ll)	cmpxchg_i32_seq_cst_seq_cst	`-mtriple=riscv64 -mattr=+a -verify-machineinstrs`
atomic-fence.23c9bce508.ll (mutant of atomic-fence.ll)	fence_acq_rel	`-mtriple=riscv64 -mattr=+zalrsc -verify-machineinstrs`
atomic-fence.3bdd8fd7e4.ll (mutant of atomic-fence.ll)	fence_acq_rel	`-mtriple=riscv64 -verify-machineinstrs`
atomic-fence.62fc5c643c.ll (mutant of atomic-fence.ll)	fence_acq_rel	`-mtriple=riscv64 -mattr=+a,+ztso -verify-machineinstrs`
atomic-fence.63bd33924c.ll (mutant of atomic-fence.ll)	fence_acq_rel	`-mtriple=riscv32 -mattr=+a,+ztso -verify-machineinstrs`
atomic-fence.675bb48098.ll (mutant of atomic-fence.ll)	fence_acq_rel	`-mtriple=riscv32 -mattr=+a -verify-machineinstrs`
atomic-fence.85b5ed9cfc.ll (mutant of atomic-fence.ll)	fence_acq_rel	`-mtriple=riscv32 -mattr=+zalrsc -verify-machineinstrs`
atomic-fence.bee2432654.ll (mutant of atomic-fence.ll)	fence_acq_rel	`-mtriple=riscv64 -mattr=+a -verify-machineinstrs`
atomic-fence.c5d2dbbacb.ll (mutant of atomic-fence.ll)	fence_acq_rel	`-mtriple=riscv32 -verify-machineinstrs`
atomic-rmw-minmax.084a3b2daa.ll (mutant of atomic-rmw-minmax.ll)	atomicrmw_umax_i32_seq_cst	`-mtriple=riscv64 -mattr=+b,+zalrsc,+permissive-zalrsc -verify-machineinstrs`
atomic-rmw-minmax.1ed9f94960.ll (mutant of atomic-rmw-minmax.ll)	atomicrmw_umax_i32_seq_cst	`-mtriple=riscv32 -mattr=+b,+zalrsc,+permissive-zalrsc,+a -verify-machineinstrs`
atomic-rmw-minmax.23e165e948.ll (mutant of atomic-rmw-minmax.ll)	atomicrmw_umax_i32_seq_cst	`-mtriple=riscv32 -mattr=+b,+zalrsc -verify-machineinstrs`
atomic-rmw-minmax.b3ccbb70f4.ll (mutant of atomic-rmw-minmax.ll)	atomicrmw_umax_i32_seq_cst	`-mtriple=riscv32 -mattr=+b,+zalrsc,+permissive-zalrsc -verify-machineinstrs`
atomic-rmw-minmax.ccf9115016.ll (mutant of atomic-rmw-minmax.ll)	atomicrmw_umax_i32_seq_cst	`-mtriple=riscv64 -mattr=+b,+zalrsc -verify-machineinstrs`
atomic-rmw-minmax.dcb19d8711.ll (mutant of atomic-rmw-minmax.ll)	atomicrmw_umax_i32_seq_cst	`-mtriple=riscv64 -mattr=+b,+zalrsc,+permissive-zalrsc,+a -verify-machineinstrs`
atomic-rmw-sub.1a9898ace2.ll (mutant of atomic-rmw-sub.ll)	atomicrmw_sub_i32_neg	`-mtriple=riscv32 -verify-machineinstrs`
atomic-rmw-sub.42ccf1f00c.ll (mutant of atomic-rmw-sub.ll)	atomicrmw_sub_i32_neg	`-mtriple=riscv32 -mattr=+a -verify-machineinstrs`
atomic-rmw-sub.55d4306c42.ll (mutant of atomic-rmw-sub.ll)	atomicrmw_sub_i32_neg	`-mtriple=riscv64 -verify-machineinstrs`
atomic-rmw-sub.8ae217dcc5.ll (mutant of atomic-rmw-sub.ll)	atomicrmw_sub_i32_neg	`-mtriple=riscv64 -mattr=+a -verify-machineinstrs`
atomic-rmw-sub.9b2fbe5256.ll (mutant of atomic-rmw-sub.ll)	atomicrmw_sub_i32_neg	`-mtriple=riscv32 -mattr=+zalrsc -verify-machineinstrs`
atomic-rmw-sub.e13b2a6f07.ll (mutant of atomic-rmw-sub.ll)	atomicrmw_sub_i32_neg	`-mtriple=riscv64 -mattr=+zalrsc -verify-machineinstrs`
atomicrmw-cond-sub-clamp.1e131b3f2f.ll (mutant of atomicrmw-cond-sub-clamp.ll)	atomicrmw_usub_cond_i32	`-mtriple=riscv32 -mattr=+a,+ztso -verify-machineinstrs`
atomicrmw-cond-sub-clamp.44051a05cc.ll (mutant of atomicrmw-cond-sub-clamp.ll)	atomicrmw_usub_cond_i32	`-mtriple=riscv32 -verify-machineinstrs`
atomicrmw-cond-sub-clamp.48d1585c26.ll (mutant of atomicrmw-cond-sub-clamp.ll)	atomicrmw_usub_cond_i32	`-mtriple=riscv32 -mattr=+a -verify-machineinstrs`
atomicrmw-cond-sub-clamp.4a36d00fe8.ll (mutant of atomicrmw-cond-sub-clamp.ll)	atomicrmw_usub_cond_i32	`-mtriple=riscv64 -mattr=+a -verify-machineinstrs`
atomicrmw-cond-sub-clamp.528d386a2a.ll (mutant of atomicrmw-cond-sub-clamp.ll)	atomicrmw_usub_cond_i32	`-mtriple=riscv64 -verify-machineinstrs`
atomicrmw-cond-sub-clamp.fda2aff0e7.ll (mutant of atomicrmw-cond-sub-clamp.ll)	atomicrmw_usub_cond_i32	`-mtriple=riscv64 -mattr=+a,+ztso -verify-machineinstrs`

Generated 2026-10-15 08:05 UTC.